CN107863276A - A kind of self-shield D.C. contactor drive circuit - Google Patents
A kind of self-shield D.C. contactor drive circuit Download PDFInfo
- Publication number
- CN107863276A CN107863276A CN201711286209.9A CN201711286209A CN107863276A CN 107863276 A CN107863276 A CN 107863276A CN 201711286209 A CN201711286209 A CN 201711286209A CN 107863276 A CN107863276 A CN 107863276A
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- Prior art keywords
- contactor
- resistance
- connects
- shield
- self
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/002—Monitoring or fail-safe circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
- H01H47/32—Energising current supplied by semiconductor device
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- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
Abstract
The invention discloses a kind of self-shield D.C. contactor drive circuit; including isolation optocoupler, bidirectional thyristor, voltage-stabiliser tube, MOSFET pipes; prevent reversed diode; fly-wheel diode and filter circuit, resistance, the first divider resistance, the second divider resistance and driving resistance composition; isolation optocoupler connects positive source by isolating the 5th resistance, and isolation optocoupler connects one end of the second divider resistance, one end of bidirectional thyristor and the one end for driving resistance by the first divider resistance.Beneficial effect of the present invention：The present invention realizes the fast and reliable work of high-power direct current contactor, has automatic protection functions; realize the reliably working to D.C. contactor; ensure the reliable and stable work of D.C. contactor; avoid the damage of contactor; extend the service life and service efficiency of D.C. contactor; realize that safety is long-term, improve the control performance and usage safety performance of whole D.C. contactor.
Description
Technical field
The present invention relates to contactor actuation techniques field, especially a kind of self-shield D.C. contactor drive circuit.
Background technology
High-power direct current contactor, its good reliability, closed structure, coil direct current supply are stable, shockproof, automobile,
Industry Control, especially urban track traffic and railway locomotive widely use.Control for high-power direct current contactor, typically
It is controlled using the auxiliary reclay of control signal plus small voltage, low current, then with the normally-open normally-close of auxiliary reclay
Contact controls the high power DC to post opening and turning off for contactor coil, and this control method is, it is necessary to extra middle relay
Device, and do not protect, fault rate is added, it is fragile.
It is the usual method of current control high-power direct current contactor as shown in Figure 1, its operation principle is：Control signal is driven
Dynamic triode Q1 conductings, auxiliary reclay KM1 coils obtain electric, normally opened contact closure, high-power direct current contactor coil obtain it is electric, greatly
Power DC contactor KM2 starts working, the action of its main contacts, so as to which the equipment being connected with it is started working.This circuit is used
The break-make of triode come control auxiliary reclay so that control high-power direct current contactor.Multiple big work(are controlled with this circuit
Just needing to use multiple auxiliary reclays during rate D.C. contactor, this high-power direct current contactor circuit can realize its function,
But it is as follows to bring some problems：(1) auxiliary reclay coil is thinner, easily breaks, and makes poor contact of contacts, while may be used also
Tripping operation of bypassing the immediate leadership can be caused；(2) when operating between it is long when, coil can generate heat, and then can make coil burnout, cause contact to tamper
Make；(3) we will select the type of suitable auxiliary reclay, and the later stage will also be managed and safeguard to relay, and these are all
It is cumbersome；(4) wiring is more and complicated, and the examination and maintenance in later stage are highly inconvenient；(5) cost can greatly improve, cost performance
It is not high；(6) this drive circuit does not protect power, easily breaks down.
Therefore, it is necessary to propose a kind of self-shield D.C. contactor drive circuit for above mentioned problem.
The content of the invention
The present invention seeks to overcome deficiency of the prior art, there is provided a kind of self-shield D.C. contactor driving electricity
Road.
In order to solve the above-mentioned technical problem, the present invention is to be achieved through the following technical solutions：
A kind of self-shield D.C. contactor drive circuit, including isolation optocoupler, bidirectional thyristor, voltage-stabiliser tube, MOSFET pipe,
Prevent reversed diode, fly-wheel diode and filter circuit, resistance, the first divider resistance, the second divider resistance and driving resistance group
Into the first end pin of the isolation optocoupler connects positive source by the 5th resistance, and the 4th end pin of the isolation optocoupler passes through
First divider resistance connects one end of one end of the second divider resistance, one end of bidirectional thyristor and driving resistance, the driving
The other end of resistance connects one end of voltage-stabiliser tube and the grid of MOSFET pipes respectively, and the source electrodes of the MOSFET pipes passes through anti-reversed
Diode connects filter circuit and fly-wheel diode respectively.
Preferably, the drain electrode of the MOSFET pipes connects the other end of voltage-stabiliser tube and the other end of bidirectional thyristor respectively.
Preferably, the other end of the bidirectional thyristor also connects the another of the second divider resistance respectively by first resistor
End and connection D.C. contactor positive terminal.
Preferably, the filter circuit includes the first magnetic bead, the second magnetic bead, the first electric capacity.
Preferably, one end of first magnetic bead connects anti-reverse diode, and the other end of first magnetic bead leads to respectively
Cross the first capacity earth and connect one end of the second magnetic bead.
Preferably, the coil of the other end connection D.C. contactor of second magnetic bead, the coil of D.C. contactor is in addition
One termination power cathode, the closure of the D.C. contactor coil control main contacts disconnect.
Preferably, the second end pin of the isolation optocoupler receives control signal, and the 3rd end pin of the isolation optocoupler connects directly
Flow contactor negative pole end.
Beneficial effect of the present invention：The present invention realizes high-power direct current contactor with Power Electronic Technique, automatic technology
Fast and reliable work, there are automatic protection functions, realize the reliably working to D.C. contactor, the circuit function having, really
The reliable and stable work of D.C. contactor is protected, possessed automatic quick defencive function, avoids contactor energy when excessively stream
Damage, extend the service life and service efficiency of D.C. contactor, realize that safety is long-term, improve whole D.C. contactor
Control performance and usage safety performance.
Design, concrete structure and the caused technique effect of the present invention are described further below with reference to accompanying drawing, with
It is fully understood from the purpose of the present invention, feature and effect.
Brief description of the drawings
Fig. 1 is the high-power direct current contactor electric operation control circuit figure of prior art；
Fig. 2 is the contactor drive circuit figure of the present invention.
Embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
As shown in Fig. 2 a kind of self-shield D.C. contactor drive circuit, including isolation optocoupler TPL1, bidirectional thyristor T1,
Voltage-stabiliser tube WD1, MOSFET pipe T2, prevent reversed diode D1, sustained diode 2 and filter circuit, resistance R1, the first partial pressure electricity
R2, the second divider resistance R3 and driving resistance R4 compositions are hindered, the first end pin of the isolation optocoupler TPL1 passes through the 5th resistance R5
Positive source is connected, the 4th end pin of the isolation optocoupler TPL1 passes through first divider resistance R2 the second divider resistances of connection R3's
One end of one end, bidirectional thyristor T1 one end and driving resistance R4, the other end of the driving resistance R4 connect voltage stabilizing respectively
Pipe WD1 one end and MOSFET pipes T2 grid, the source electrode of the MOSFET pipes T2 is by preventing that reversed diode D1 is connected respectively
Filter circuit and sustained diode 2, the second end pin of the isolation optocoupler TPL1 receive control signal, the isolation optocoupler
TPL1 the 3rd end pin meets D.C. contactor negative pole end DC-；Positive source is 5V.
Further, the drain electrode of the MOSFET pipes T2 connects the voltage-stabiliser tube WD1 other end and bidirectional thyristor T1 respectively
The other end, the other end of the bidirectional thyristor T1 also connects the another of the second divider resistance R3 respectively by first resistor R1
One end and connection D.C. contactor positive terminal DC+.
Wherein, the filter circuit includes the first magnetic bead FB1, the second magnetic bead FB2, the first electric capacity C1, first magnetic bead
FB1 one end connects anti-reverse diode D1, and the other end of the first magnetic bead FB1 is grounded and connected by the first electric capacity C1 respectively
Connect the second magnetic bead FB2 one end, the coil KM1 of the other end connection D.C. contactor of the second magnetic bead FB2, D.C. contactor
Coil KM1 other ends connection negative pole end DC-, the D.C. contactor coil KM1 control main contacts closure disconnect..
The present invention with Power Electronic Technique, automatic technology, realize high-power direct current contactor fast and reliable work,
With automatic protection functions, the reliably working to D.C. contactor is realized, the circuit function having, it is ensured that D.C. contactor is stable
Reliably working, possessed automatic quick defencive function, avoids the damage of contactor energy, extends direct current when excessively stream
The service life and service efficiency of contactor, realize that safety is long-term, improve control performance and the use of whole D.C. contactor
Security performance.
The most significant feature of the present invention is exactly the speed-sensitive switch characteristic using power MOSFET pipe T2 and bidirectional thyristor T1
To be designed, there is the advantages that actuating speed is quick, self-protection function
Its operation principle：
As shown in Fig. 2 the present invention can realize the reliable and stable driving and self-shield of high-power direct current contactor；Isolation optocoupler
TPL1 primary side pins connect control signal, control the adhesive and disconnection of D.C. contactor, and secondary pin connects D.C. contactor respectively
Coil drive DC voltage, one of pin connect the negative of DC voltage, and another pin is connect by current-limiting resistance R2 and R3
DC voltage just, respectively connected bidirectional thyristor and MOSFET pipes T2；When high-power direct current contactor main contacts will close
When closing work, control signal driving optocoupler TPL1 conductings, driving MOSFET pipes T2 is turned on, and DC voltage is straight by T2 supplies
Contactor coil is flowed, D.C. contactor coil obtains electric, contactor start-up operation, main contacts closure, so as to the operating of control device；
Conversely, control signal driving optocoupler TPL1 disconnects, driving MOSFET pipes T2 disconnects, and D.C. contactor coil blackout, main contacts breaks
Open；
Optocoupler TPL1 is driven to select its model, current limliting according to the speed and the power supply of D.C. contactor for needing to open in circuit
And divider resistance R2, R3, when optocoupler turns on, by divider resistance R2 output, metal-oxide-semiconductor T2 driving resistance R4 is met, according to
The value (DC+, DC-) of DC voltage, and selected metal-oxide-semiconductor T2, determine resistance R2, R3 and R4 resistance.In Fig. 2 circuits
T2 selections are the power MOSFET pipe of low pass, and when its gate pole pipe G pin presses for height, T2 devices turn off, when its G gate pole pin
For low-voltage when, break-over of device.Voltage-stabiliser tube WD1 in Fig. 2, can be by the voltage of T2 gate pole G pins when circuit metal-oxide-semiconductor T2 is turned on
Stabilization is in 10V or so, the guarantee reliable and stable ON operations of power MOSFET pipe T2.
R1 is milliohm resistance in circuit, needs current value to be protected to select its resistance according to D.C. contactor, and be connected in
Bidirectional thyristor T1 gate pole and another extremely on, mainly play overcurrent protection, when excessively stream occurs, R1 is ohmically
Voltage rises, and this voltage is connected on bidirectional thyristor T1 gate pole, turns on bidirectional thyristor T1, the positive electricity of DC voltage
Source is added to by bidirectional thyristor on MOSFET pipes T2 gate pole G, and it is high voltage to draw gate pole G pins, turns off MOSFET rapidly
Pipe T2, so as to which D.C. contactor powers off, it is stopped, plays overcurrent protection.
D2 in Fig. 2 is afterflow fast recovery diode, and when D.C. contactor turns off, the energy in coil is discharged, with
Unburned bad coil, and then play a protective role, D1 is to prevent reversed diode, prevents that power supply is reversed, so as to protect drive circuit,
FB1 and FB2 is magnetic bead, the high fdrequency component in filtering circuit, improves the antijamming capability of circuit.
The circuit advantage of the present invention：(1) with the small micro-chip processor of power, optocoupler, the sensitive electric power of switching characteristic
Power output device direct drive contactor small MOSFET etc.；(2) its control is easier, and wiring is simple, is easy to
Operation is (using chip along with the multiple such circuits of corresponding button can control, it is no longer necessary to multiple middle relays
Device).Operating efficiency is so not only increased, also high cost performance is very convenient and practical.
Preferred embodiment of the invention described in detail above.It should be appreciated that one of ordinary skill in the art without
Creative work can is needed to make many modifications and variations according to the design of the present invention.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (5)
- A kind of 1. self-shield D.C. contactor drive circuit, it is characterised in that：Including isolation optocoupler, bidirectional thyristor, voltage-stabiliser tube, MOSFET is managed, and prevents reversed diode, fly-wheel diode and filter circuit, resistance, the first divider resistance, the second divider resistance and drive Dynamic resistance composition, the first end pin of the isolation optocoupler connect positive source by the 5th resistance, and the 4th of the isolation optocoupler the Pin is held to connect one end of the second divider resistance, one end of bidirectional thyristor and the one end for driving resistance by the first divider resistance, The other end of the driving resistance connects the grid of one end and MOSFET pipes of voltage-stabiliser tube respectively, and the source electrode of the MOSFET pipes leads to Cross and prevent that reversed diode connects filter circuit and fly-wheel diode respectively；The drain electrode of the MOSFET pipes connects voltage-stabiliser tube respectively The other end of the other end and bidirectional thyristor；The other end of the bidirectional thyristor also connects second point respectively by first resistor The other end and connection D.C. contactor positive terminal of piezoresistance.
- A kind of 2. self-shield D.C. contactor drive circuit as claimed in claim 1, it is characterised in that：The filter circuit bag Include the first magnetic bead, the second magnetic bead, the first electric capacity.
- A kind of 3. self-shield D.C. contactor drive circuit as claimed in claim 2, it is characterised in that：First magnetic bead One end connects anti-reverse diode, and the other end of first magnetic bead passes through the second magnetic bead of the first capacity earth and connection respectively One end.
- A kind of 4. self-shield D.C. contactor drive circuit as claimed in claim 3, it is characterised in that：Second magnetic bead The other end connects the coil of D.C. contactor, and the coil other end of D.C. contactor connects power cathode, the D.C. contactor The closure of coil control main contacts disconnects.
- A kind of 5. self-shield D.C. contactor drive circuit as claimed in claim 4, it is characterised in that：The isolation optocoupler Second end pin receives control signal, and the 3rd end pin of the isolation optocoupler connects D.C. contactor negative pole end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711286209.9A CN107863276B (en) | 2017-12-07 | 2017-12-07 | Self-protection direct current contactor drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711286209.9A CN107863276B (en) | 2017-12-07 | 2017-12-07 | Self-protection direct current contactor drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107863276A true CN107863276A (en) | 2018-03-30 |
| CN107863276B CN107863276B (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711286209.9A Active CN107863276B (en) | 2017-12-07 | 2017-12-07 | Self-protection direct current contactor drive circuit |
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| CN (1) | CN107863276B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110545097A (en) * | 2019-07-24 | 2019-12-06 | 上海空间电源研究所 | low-voltage pulse trigger controlled contactless switch circuit |
| CN110660613A (en) * | 2018-06-28 | 2020-01-07 | 深圳光峰科技股份有限公司 | Power supply line control module |
| CN110867343A (en) * | 2019-11-20 | 2020-03-06 | 广州金升阳科技有限公司 | Contactor coil isolation control circuit and isolation control method thereof |
| CN113162139A (en) * | 2021-03-12 | 2021-07-23 | 合肥同智机电控制技术有限公司 | Automatic detection handheld starting device suitable for ultralow temperature starting |
| CN113506706A (en) * | 2021-06-28 | 2021-10-15 | 江苏纳通能源技术有限公司 | High-reliability contactor driving circuit and working method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110660613A (en) * | 2018-06-28 | 2020-01-07 | 深圳光峰科技股份有限公司 | Power supply line control module |
| CN110545097A (en) * | 2019-07-24 | 2019-12-06 | 上海空间电源研究所 | low-voltage pulse trigger controlled contactless switch circuit |
| CN110545097B (en) * | 2019-07-24 | 2023-06-16 | 上海空间电源研究所 | Contactless switch circuit controlled by low-voltage pulse trigger |
| CN110867343A (en) * | 2019-11-20 | 2020-03-06 | 广州金升阳科技有限公司 | Contactor coil isolation control circuit and isolation control method thereof |
| CN113162139A (en) * | 2021-03-12 | 2021-07-23 | 合肥同智机电控制技术有限公司 | Automatic detection handheld starting device suitable for ultralow temperature starting |
| CN113506706A (en) * | 2021-06-28 | 2021-10-15 | 江苏纳通能源技术有限公司 | High-reliability contactor driving circuit and working method |
| CN113506706B (en) * | 2021-06-28 | 2024-03-19 | 江苏纳通能源技术有限公司 | Contactor driving circuit with high reliability and working method |
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| CN107863276B (en) | 2021-04-02 |
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